I have a windows PC and receive these errors
“kicad-4.0.5-i686.exe is not a valid Win32 application”
and “kicad-4.0.5-x86_64.exe is not a valid Win32 application”
when installing KiCad I tried both new stable versions 32 and 64 bit does anyone have an idea what I am doing wrong.

PS: hashtab is an addon I installed some years ago. Use at your own risk. I’m not affiliated.

PPS: first indication of badly corrupt files would be different file sizes (in bytes as you can see them under Properties>General). Not so badly damaged files will have different checksums but the same size, thus the hashtab addon.

So far everyone who has verified that they can run both images is also running 64-bit Windows. Both installers should be 32-bit programs anyway. I did notice though, since 4.0.4 the installer’s language has changed to Greek. Was English in 4.0.2 but previous versions didn’t contain any version information. Not sure if that could be an issue though.

Joan & David sorry I didn’t read your posts attentively, I think you were right the setup files I download are not correct it is only 2KB size files and I get them from this website: http://kicad-pcb.org/download/windows/ . This might be my problem do you perhaps have a link to the correct exe files?

That’s the correct source.
If they are just 2kb after downloading you either saved the html link by accident and didn’t wait for the download dialog to pop up and ask you where to save them or something else went wrong?
If you can, re-download the _64 file again and make sure you get the 344MB on your end.